Concrete crack control construction method for ultra-long seamless structure of basement: Fid-Bau Portal

Concrete crack control construction method for ultra-long seamless structure of basement

LI JINLONG / FAN WENGUANG / YU TAO

The invention relates to a basement ultra-long seamless structure concrete crack control construction method which comprises the following steps: considering a temperature effect in structural analysis, and combining the temperature effect as a load working condition with other load working conditions; telescopic post-cast strips are arranged on the floor system according to the interval of 30-40 m, and shrinkage stress generated by part of concrete in the curing process is released; according to the calculation result of the temperature effect, the anti-cracking capability of the structure is improved by reinforcing reinforcements at different parts; and an anti-cracking agent is added into the basement structure. According to the method, the temperature effect is used as a load working condition to be combined with other load working conditions, the telescopic post-cast strip is arranged on the floor system at the interval of 30-40 m, reinforcing bars are reinforced at different positions to improve the anti-cracking capacity of the structure, and the like, and cracks are avoided by improving the quality of concrete.

本发明涉及一种地下室超长无缝结构混凝土裂缝控制施工方法，在结构分析中考虑温度作用，将温度作用作为一种荷载工况与其他荷载工况进行组合；按30m‑40m的间距在楼盖上设置伸缩后浇带，释放部分混凝土在养护过程中产生的收缩应力；根据温度作用的计算结果，通过在不同部位加强配筋提高结构抗裂能力；在地下室结构中添加抗裂剂。本发明采用了将温度作用作为一种荷载工况与其他荷载工况进行组合、30m~40m的间距在楼盖上设置伸缩后浇带、不同部位加强配筋提高结构抗裂能力等多种方法，通过改善混凝土质量，避免裂缝的产生。

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